thompson



plates ff, the lever D, and cam h, attached to the shaft e, the latch b,pivoted on the crossbar A, and actuated by the aforesaid cam, and thelever d, attached to the scraper-plate, substantially as described andshown.

7. In combination with the runners RRand the scraping-plate 0 betweensaid runners, the scrapers 'i 1', connected vertically adj ustable onthe front end of the runners, substantially as and for the purpose setforth.

8. In combination with the runnersR R and the scraping-plate 0 betweensaid runners, the scrapers i t, connected vertically adjustable on thefront end of the runners and standing convergent toward the spacebetween the runners, substantially as and for the purpose set forth.

9. In combination with the runners R R and the scraping-plate 0 betweenthe runners, the scrapers i 2', connected Vertically adjusta- 2o ble onthe front end of the runners, the shaft Z, pivoted on top of the runnersand having arms m m, connected with the scrapers i i, the lever-arm n,projecting vertically from the shaft Z, and the rod 0, extended rearwardfrom the said arm,substantially as described and shown. In testimonywhereof Ihave hereunto signed my name and affixed my seal,in thepresence of two attesting witnesses, at Syracuse, in the county ofOnondaga,in the State of NeWYork. 3 this 5th day of February, 1886.

JOSEPH T. THOMPSON. [L s] Witnesses:

G. BENDIXON, FREDERICK H. GIBBS.

(No Model.)

R. S. THOMPSON.

UASTER.

No. 340,170. PatentedAprQ 20, 1886.

Fig. 1.

Witnesses Attdrney

